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Message-ID: <CA+V-a8tKUwZRsxQQORjD2vg16w6UMVCsWKkTSNOvrQ=mBL97Jw@mail.gmail.com>
Date: Sun, 26 May 2013 18:22:06 +0530
From: Prabhakar Lad <prabhakar.csengg@...il.com>
To: Hans Verkuil <hans.verkuil@...co.com>,
Mauro Carvalho Chehab <mchehab@...hat.com>,
LMML <linux-media@...r.kernel.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
LKML <linux-kernel@...r.kernel.org>,
"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Sakari Ailus <sakari.ailus@....fi>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v4] media: i2c: tvp514x: add OF support
Hi All,
On Sun, May 26, 2013 at 6:10 PM, Prabhakar Lad
<prabhakar.csengg@...il.com> wrote:
> From: Lad, Prabhakar <prabhakar.csengg@...il.com>
>
> add OF support for the tvp514x driver.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
> Cc: Hans Verkuil <hans.verkuil@...co.com>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
> Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Cc: Sakari Ailus <sakari.ailus@....fi>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: Rob Herring <rob.herring@...xeda.com>
> Cc: Rob Landley <rob@...dley.net>
> Cc: devicetree-discuss@...ts.ozlabs.org
> Cc: linux-doc@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: davinci-linux-open-source@...ux.davincidsp.com
> ---
> Tested on da850-evm.
>
> RFC v1: https://patchwork.kernel.org/patch/2030061/
> RFC v2: https://patchwork.kernel.org/patch/2061811/
>
> Changes for current version from RFC v2:
> 1: Fixed review comments pointed by Sylwester.
>
> Changes for v2:
> 1: Listed all the compatible property values in the documentation text file.
> 2: Removed "-decoder" from compatible property values.
> 3: Added a reference to the V4L2 DT bindings documentation to explain
> what the port and endpoint nodes are for.
> 4: Fixed some Nits pointed by Laurent.
> 5: Removed unnecessary header file includes and sort them alphabetically.
>
> Changes for v3:
> 1: Rebased on patch https://patchwork.kernel.org/patch/2539411/
>
> Changes for v4:
> 1: added missing call for of_node_put().
> 2: Rebased the patch on v3.11.
>
> .../devicetree/bindings/media/i2c/tvp514x.txt | 45 ++++++++++++++
> drivers/media/i2c/tvp514x.c | 62 ++++++++++++++++++--
> 2 files changed, 101 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/media/i2c/tvp514x.txt
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/tvp514x.txt b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
> new file mode 100644
> index 0000000..cc09424
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
> @@ -0,0 +1,45 @@
> +* Texas Instruments TVP514x video decoder
> +
> +The TVP5146/TVP5146m2/TVP5147/TVP5147m1 device is high quality, single-chip
> +digital video decoder that digitizes and decodes all popular baseband analog
> +video formats into digital video component. The tvp514x decoder supports analog-
> +to-digital (A/D) conversion of component RGB and YPbPr signals as well as A/D
> +conversion and decoding of NTSC, PAL and SECAM composite and S-video into
> +component YCbCr.
> +
> +Required Properties :
> +- compatible : value should be either one among the following
> + (a) "ti,tvp5146" for tvp5146 decoder.
> + (b) "ti,tvp5146m2" for tvp5146m2 decoder.
> + (c) "ti,tvp5147" for tvp5147 decoder.
> + (d) "ti,tvp5147m1" for tvp5147m1 decoder.
> +
> +- hsync-active: HSYNC Polarity configuration for endpoint.
> +
> +- vsync-active: VSYNC Polarity configuration for endpoint.
> +
> +- pclk-sample: Clock polarity of the endpoint.
> +
> +
> +For further reading of port node refer Documentation/devicetree/bindings/media/
> +video-interfaces.txt.
> +
> +Example:
> +
> + i2c0@...2000 {
> + ...
> + ...
> + tvp514x@5c {
> + compatible = "ti,tvp5146";
> + reg = <0x5c>;
> +
> + port {
> + tvp514x_1: endpoint {
> + hsync-active = <1>;
> + vsync-active = <1>;
> + pclk-sample = <0>;
> + };
> + };
> + };
> + ...
> + };
> diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c
> index 7438e01..803f3b8 100644
> --- a/drivers/media/i2c/tvp514x.c
> +++ b/drivers/media/i2c/tvp514x.c
> @@ -38,6 +38,7 @@
>
> #include <media/v4l2-device.h>
> #include <media/v4l2-common.h>
> +#include <media/v4l2-of.h>
> #include <media/v4l2-mediabus.h>
> #include <media/v4l2-chip-ident.h>
> #include <media/v4l2-ctrls.h>
> @@ -1055,6 +1056,42 @@ static struct tvp514x_decoder tvp514x_dev = {
>
> };
>
> +static struct tvp514x_platform_data *
> +tvp514x_get_pdata(struct i2c_client *client)
> +{
> + struct tvp514x_platform_data *pdata = NULL;
> + struct v4l2_of_endpoint bus_cfg;
> + struct device_node *endpoint;
> + unsigned int flags;
> +
> + if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
> + return client->dev.platform_data;
> +
> + endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
> + if (!endpoint)
> + goto done;
> +
Ahh this had to be return NULL I'll respin a new version fixing it.
Regards,
--Prabhakar Lad
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